Pulley-block.



\ PATBNTBD MAY-26. 1903. J.. L. DE voU. j PULLBY BLoGK. APPLIOATIO-NTILED HAB.. 2, 1903.

N0 MODEL Y Inl/Enron @iV/mmf il BY No. 729,024. P-ATENTBD MAY 26. 1903.' J. L. DE von.v PULLEY BLoGK.

APL'IoATIoN FILED ma. z. moa.

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Patented May 26, 1903.

PATENT OFFICE.

JAMES L. DEVOU, OF WISSAHICKON, PENNSYLVANIA.

PU LLEY-BLOCK.

SPECIFICATION forming part of Letters Patent N o. 729,024, dated May 26, 1903.

Application filed March 2, 1903.

To @ZZ whom it may concern:

Be it known that I, JAMES L. DE VOU, residingat Wissahickon, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Pulley-Blocks, of which the following is a specification.

This invention relates to that form of pulley-blocks known as snatch-blocks, and it is designed to provide an improved construction of convenient operation having increased strength and reduced tendency to distortion without increased weight or c ost.

The nature and characteristic features of the improvements will more fully appear by reference to the following description and the accompanying drawings in illustration thereof, of which- Figure 1 represents a front elevation of a snatch-block made in accordance with my invention. Fig. 2 represents a rear elevation thereof. Fig. 3 represents a vertical transverse sectional view thereof. Fig. 4 represents a front elevation of a modied form of construction, and Fig. 5 represents a side elevation of the construction shown in Fig. 4.

Referring to the drawings, as shown in Figs. 1 to 3, inclusive, the strap or hanger 1, preferably forged and in a single piece, has the shutter 2, provided with a wide base, pivotally connected therewith by the pintle A pin 4 passes through the parallel members 1 and 1" at the top of the hanger and has the projecting end 4', adapted'to engage the aperture 2 in the shutter, a` latch 5, pivoted on the shutter, engaging the opening 4" of the pin to secure the block closed. The shutter whose base is made wider than the strap therefor supports the guard 6 and prevents it from breaking, thus avoiding this inconvenience and expense in the usual construction in which a wooden guard is attached to a narrow shutter and has its unsupported ends projecting therefrom. The hanger has secured therein the cheek piece 6, enacting with the guard 6', and the cheek-piece 7, which coact with the members 9 and 9' in the formation of the pulley-block. The pin 4 passes through the cheek-piece 7, to which it is held Serial No. 145,739. (No model.)

by a key 8 and holds the brace-block 9 in position, the pin and the brace-block acting to stiden the top of the hanger and prevent the tendency to distortion commonly found in the top of snatch-block hangers. The she-ave 10 is supported on the arbor 11, which passes through the cheek pieces and the hanger members for supporting the same, and the block is supported by the hook 12, which is swiveled in the top of the hanger.

As shown in Figs. 4 and 5, the hanger or strap 13 has the part 13" offset to form with the cheek-piece 14 bearings for the'pintle 15 and the shutter 16, through Whichit passes. The shutter is engaged by the pin 17, which passes through the members 13 and 13" of the strap, serving to strengthen the head of the hanger as well as to secure the shutter. The pin vis held in working position by the nut 17 and is prevented from being wholly withdrawn by a cotter-key 17, which passes through the pin. The hanger also supports the cheek-piece 14', and the arbor 18 is passed through the hanger and the cheek-pieces to support the sheave 19. The hook 20, swiveled in the hanger, supports the block.

Having described my invention, I claim-- 1. A pulley-block having an open strap or hanger, a shutter pivoted to said hanger, and a pin passing through the shutter and the hanger members to secure the shutter and brace the hanger, substantially as specified.

2. A pulley-block comprising a hanger having an opening in the sidevthereof, a shutter having a guard-bearing of greater breadth than said hanger, said shutter being pivoted to said hanger, a cheek-piece supported by said hanger, and a guard coacting therewith and supported by said shutter, substantially as specified.

3. A pulley-block having an open strap or hanger, a closing shutter pivoted to said hanger, a pin passing through the parallel members at the top of the hangerand adapted to engage the shutter, and a keypassing through said pin to control the same, substantially as specified.

4. A pulley-block having an open strap or hanger, a closing shutter pivoted to said hanger, a pin passing through the parallel 1903, inthe presence of the subscribing witmembers at the top of the hanger and adapt- Ilesses.

ed to anfrage the shutter, and a key passino throughbsad pin and fixed with relation t; JAMES L' DE VOU' 5 said hanger, substantially as speoied. vWitnesses:

In testimony whereof I have hereunto set THOMAS S. GATES,

my hand, this 28th day of February, A. D. UTLEY E. CRANE, Jr. 

